MHSC MJ27NR Install Manual

MHSC
Brand
MHSC
Model
MJ27NR
Category
Fireplaces
Type
Install Manual

This manual is also suitable for

860024
MJ27 cover
10/08
Unvented Gas Log
Heater
Models: MJ27NR, MJ27PR
86D0024 02/16 Rev. 8
Installation and
Operating Instructions
WARNINGS
If the information in this manual is not followed
exactly, a re or explosion may result causing
property damage, personal injury or loss of
life.
– Do not store or use gasoline or other
ammable vapors and liquids in the vicinity
of this or any other appliance.
– WHAT TO DO IF YOU SMELL GAS
• Do not try to light any appliance.
• Do not touch any electrical switch; do not
use any phone in your building.
• Immediately call your gas supplier from
a neighbor's phone. Follow the gas
supplier's instructions.
• If you cannot reach your gas supplier, call
the re department.
– Installation and service must be performed
by a qualied installer, service agency or the
gas supplier.
This appliance may be installed in an
aftermarket, permanently located,
manufactured (mobile) home, where not
prohibited by local codes.
This appliance is only for use with the type
of gas indicated on the rating plate. This
appliance is not convertible for use with
other gases.
This is an unvented gas-red heater. It uses
air (oxygen) from the room in which it is
installed. Provisions for adequate combustion
and ventilation air must be provided.
Refer to Page 5.
INSTALLER: Leave this manual with the appliance.
CONSUMER: Retain this manual for future refer-
ence.
86D0024
2
"MOJO" Series Unvented Gas Log Sets
CONTENTS
Important Safety Information ..................................... 3
Codes ...................................................................... 4
Product Features and Specications ....................... 5
Gas Pressures ........................................................ 5
 GasSpecications .................................................. 5
Ignition Controls ...................................................... 5
Pilot/ODS ................................................................ 5
Thermal Generator .................................................. 5
Getting Started ............................................................. 5
Fireplace and Hearth Dimensions ............................. 6
Placement in a Fireplace with Restrictive Barrier .... 6
Clearances and Height Requirements ...................... 7
Floor Clearance .......................................................... 9
Installation .................................................................. 10
Place and Secure Appliance ................................. 10
Assembly Procedure ............................................. 10
Gas Line Installation ................................................. 11
Check Gas Pressure ............................................. 12
Millivolt .................................................................. 12
Electrical Wiring - Millivolt ........................................ 13
Connect Remote Receiver .................................... 14
Check System Operation ...................................... 14
Log Placement .......................................................... 15
Place Rock Wool ................................................... 15
Place Flickering Embers ....................................... 18
Flame Appearance ..................................................... 19
Pilot Flame ............................................................ 19
Burner Flame ........................................................ 19
Operating Instructions .............................................. 20
For Your Safety Read Before Lighting .................. 21
Millivolt Control Lighting Instructions ..................... 22
Match Lighting Instructions ................................... 23
Cleaning Instructions ................................................ 23
Troubleshooting ........................................................ 24
Replacement Parts .................................................... 26
Burner Assembly ................................................... 26
Logs ...................................................................... 27
Massachusetts Residents Only................................ 30
Warranty ..................................................................... 31
Thank you and congratulations on your purchase of an Vermont Castings Group Log Set.
PLEASE READ THE INSTALLATION AND OPERATION INSTRUCTIONS BEFORE USING THE APPLIANCE!
IMPORTANT: Read all instructions and warnings carefully before starting installation.
Failure to follow these instructions may result in a possible re hazard and will void the warranty.
86D0024 3
"MOJO" Series Unvented Gas Log Sets IMPORTANT SAFETY INFORMATION
13. Avoidanydraftsthatalterburneramepatterns.Donot
allowfanstoblowdirectlyintoreplace.Donotplace
ablowerinsideburnareaofrebox.Ceilingfansmay
createdraftsthatalterburneramepatterns.Sooting
and improper burning will occur.
14. CAUTION: Candles, incense, oil lamps, etc. produce
combustion byproducts including soot. Vent-free
appliances will not lter or clean soot produced by
these types of products. In addition, the smoke and/
or aromatics (scents) may be re-burnt in the vent-free
appliance which can produce odors. It is recommended
to minimize the use of candles, incense, etc. while the
vent-free appliance is in operation.
15. This is an unvented gas-fired heater. It uses air
(oxygen)fromtheroominwhichitisinstalled.Provi-
sions for adequate combustion and ventilation air must
be provided. Page 5
16. This heater shall not be installed in a room or space
unless the required volume of indoor combustion air is
provided by the method described in the National Fuel
Gas Code, ANSI Z223.1/NFPA 54, the International
Fuel Gas Code or applicable local codes.
17. Keep room area clear and free from combustible mate-
rials,gasolineandotherammablevaporsandliquids.
18. Unvented gas heaters are a supplemental zone heater.
They are not intended to be the primary heating appli-
ance.
19. Unvented gas heaters emit moisture into the living
area. In most homes of average construction, this
does not pose a problem. In houses of extremely
tight construction, additional mechanical ventilation is
recommended.
20. During manufacturing, fabricating and shipping, various
components of this appliance are treated with certain
oils,lmsorbondingagents.Thesechemicalsarenot
harmful but may produce annoying smoke and smells
as they are burned off during the initial operation of the
appliance; possibly causing headaches or eye or lung
irritation. This is a normal and temporary occurrence.
8. CARBON MONOXIDE POISONING: Early signs of
carbonmonoxidepoisoningaresimilartotheuwith
headaches, dizziness and/or nausea. If you have these
signs, obtain fresh air immediately. Have the heater
serviced as it may not be operating properly.
9. The installation must conform with local codes or, in
the absence of local codes, with the National Fuel
Gas Code, ANSI Z223.l/NFPA54.
10. This unit complies with the latest revision of ANSI
Z21.11.2 Unvented Heaters, latest edition.
11. Do not install the heaters in a bathroom or bedroom.
12. Correct installationof the ceramicber logs, proper
location of the heater, and annual cleaning are neces-
sary to avoid potential problems with sooting. Sooting,
resulting from improper installation or operation, can
settleonsurfacesoutsidethereplace.Seelogplace-
ment instructions for proper installation.
1. Due to high temperatures, the appliance should be
locatedoutoftrafcandawayfromfurnitureand
draperies.
2. Children and adults should be alerted to the hazard
of high surface temperature and should stay away
to avoid burns or clothing ignition.
3. Young children should be carefully supervised when
they are in the same room with the appliance.
4. Donotplaceclothingorotherammablematerial
on or near the appliance.
5. Any safety screen or guard removed for servicing
an appliance, must be replaced prior to operating
the heater.
6. Installationandrepairshouldbedonebyaqualied
service person.
7. To prevent malfunction and/or sooting, an unvented
gas heater should be cleaned before use and at
least annually by a professional service person.
More frequent cleaning may be required due to
excessivelintfromcarpeting,beddingmaterial,etc.
It is imperative that control compartments, burners
and circulating air passageways be kept clean.
INSTALLER
Please leave these instructions with the appliance.
OWNER
Please retain these instructions for future reference
.
WARNING
• Any change to this heater or its controls can be dangerous.
• Improper installation or use of the heater can cause serious injury or
death from re, burns, explosion or carbon monoxide poisoning.
• Do not allow fans to blow directly into the replace. Avoid any drafts that
alter burner ame patterns.
• Do not use a blower insert, heat exchanger insert or other accessory, not
approved for use with this heater where applicable.
86D0024
4
"MOJO" Series Unvented Gas Log Sets
IMPORTANT SAFETY INFORMATION
The initial break-in operation should last four hours to
properly cure logs and rock wool, with the burner at
thehighestsetting.Provide maximum ventilationby
opening windows or doors to allow odors to dissipate.
Any odors remaining after this initial break-in period
will be slight and will disappear with continued use.
21. Input ratings are shown in BTU per hour and are for
elevations up to 2,000 feet. For elevations above 2,000
feet, input ratings should be reduced 4 percent for each
1,000 feet above sea level. Refer to the National Fuel
Gas Code.
22. The appliance and its appliance main gas valve must
be disconnected from the gas supply piping system
during any pressure testing of that system at test
pressuresinexcessof1/2psig(3.5kPa).
23. The appliance must be isolated from the gas supply
piping system by closing its equipment shutoff valve
during any pressure testing of the gas supply piping
system at test pressures equal to or less than 1/2 psig
(3.5 kPa).
24. Do not use this room heater if any part has been under
water.Immediatelycallaqualiedservicetechnician
to inspect the room heater and to replace any part
of the control system and any gas control which has
been under water.
25. This appliance must not be used with glass doors in
the closed position. This can lead to pilot outages and
severesootingoutsidethereplace.
26. Neverburnsolidfuelsinareplacewhereaunvented
room heater is installed.
27. Always have a replace screen in place when the
appliance is in operation and, unless other provisions
for combustion air are provided, the screen must have
an opening(s) for induction of combustion air.
WARNING
Never connect unit to private (non-utility)
gas wells. This gas is commonly known
as wellhead gas.
MASSACHUSETTS RESIDENTS ONLY:
Please refer to Page 30 for
additional information.
CODES
Adhere to all local codes or, in their absence, the latest
edition of THE NATIONAL FUEL GAS CODE ANSI Z223.1
or NFPA54 which can be obtained from…
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
or
National Fire Protection Association, Inc.
Batterymarch Park
Quincy, MA 02269
86D0024 5
"MOJO" Series Unvented Gas Log Sets PRODUCT FEATURES & SPECIFICATIONS
MAKE SURE YOU HAVE RECEIVED ALL
PARTS
Check your packing list to verify that all listed parts have
been received. You should have the following:
• Unvented Gas Log Burner Assembly
• Two (2) Plastic Bags Containing Crushed Volcanic
Rock
• Installation/Operating Instructions
• Two (2) Anchoring Screws
• Ceramic Fiber Logs • Rock wool
• Flickering Bright Embers
• RCSIT Hand Held Remote with Receiver
Carefully inspect the contents for shipping damage. If any
parts are missing or damaged, immediately inform the
dealer from whom you purchased the appliance. Do not
attempt to install any part of the appliance unless you
have all parts in good condition.
WHAT YOU WILL NEED FOR INSTALLATION
You should have the following items available before
proceeding with installation:
• Externalregulator(forpropane/LPGand1/2lb.
natural gas systems only)
• Piping which complies with local codes
• Sediment trap (recommended)
• Screwdriver
• Tee joint.
• Pipe sealant approved for use with propane/LPG
(Resistant to sulfur compounds)
• Drill with 5/32 masonry bit
• Pipe wrench or appropriate size crescent
• Manual shutoff valve
• Wrench set
Gloves are recommended when handling
ceramic ber logs to prevent skin irritation
from loose bers. Logs are fragile — handle
with care.
WARNING
GAS PRESSURES
*Natural **Propane (LP)
Inlet Minimum 5.0” w.c. 11.0” w.c.
 InletMaximum 10.5”w.c. 13.0”w.c.
Pilot Regulator 3.5" w.c. n/a
Regulator Pressure 4.0” w.c. 10.0” w.c.
*NOTE:Anexternalregulatorisrequiredtoreducesupply
pressuretoamaximumof101⁄2" W.C. on natural gas sys-
tems operating at higher pressure.
**NOTE:Anexternalregulatorisrequiredtoreducesup-
plypressuretoamaximumof13”w.c.
GAS SPECIFICATIONS
IGNITION CONTROLS
Piezo ignitor allows ignition of the pilot without the use of
matches or batteries.
Millivolt control with pilot has three (3) positions:
OFF - All gas to the gas logs is shut off at the valve.
IGN - Valve position to light/maintain a standing pilot.
ON - Valve position to light/maintain the gas burner.
PILOT/ODS
Thegaslogheateristtedwithaspeciallydesignedsafety
pilot(ODSassembly)whichsensestheamountofoxygen
available in the room and shuts the gas log heater off if the
oxygenlevelbeginstodropbelowasatisfactorylevel.The
pilot can only be re-lit when adequate fresh air is available.
THERMAL GENERATOR
ThemillivoltgaslogpilotisttedwithaMillivolt(thermopile)
generator to provide power for remote activation.
Min.Input Max.Input
Model Fuel Control BTU/h BTU/h
MJ27NR Nat. Millivolt 25,500 38,000
MJ27PR LP Millivolt 29,500 37,000
WARNING
If the area in which the heater may be
operated does not meet the required volume
for indoor combustion air, combustion and
ventilation air shall be provided by one
of the methods described in the National
Fuel Gas Code, ANSI Z223.1/NFPA 54, the
International Fuel Gas Code or applicable
local codes.
86D0024
6
"MOJO" Series Unvented Gas Log Sets
FIREPLACE and HEARTH DIMENSIONS
WARNING
This appliance is for installation only in a solid-fuel burning masonry or
UL127 factory-built replace, vent free appliance, or in listed unvented
rebox enclosure. It has been design certied for these installations.
Exception: DO NOT install this appliance in a factory-built replace that
includes instructions stating it has not been tested or should not be
used with unvented gas logs.
Use manufacturer's installation and clearance require-
ments as dened in their manual.
The MJ Series unvented room heater is approved for
installationintothefollowingunventedreplaces:
GCUF Series Fireboxes Magnum36/42, Lo-Rider36 or
BUF
The MJ Series unvented room heater may also be installed
intoaUnventedFireboxEnclosureforGasFiredDecorative
Type Unvented Room Heaters per IAS Requirement No.
2-97 ANSI Z21.91-2001 (typically referred to as a "Univer-
salFirebox"),aslongasreboxhearthdimensionsmeet
the minimum hearth dimensions shown below.
19”
27”
14”
30”
FP1994
Min. hearth dims
Figure 1 -
Minimum Hearth Dimension
Barriers such as the bottom of a glass door
frame placed in front of a gas log set can
change the air ow characteristics of the
replace which in turn can cause the unit
to overheat and malfunction.
WARNING
IMPORTANT INFORMATION FOR THE IN-
STALLATION OF THIS GAS LOG SET
The following are guidelines for placing a gas log set in a
replacethathasarestrictivebarrieralongthebottomfront
openingofthereplace.Someexamplesofbarriersare
glass/screendoorframesandsunken/recessedreplaces.
Height of Minimum Depth of
Restriction (x) Fireplace/Firebox
No Restriction 14”
0” to 11⁄2” 17”
Greater than 11⁄2” to 3” 17”
Greater than 3” *
*Any barrier greater than 3” placed in front of the gas log
set is not recommended by the manufacturer.
NOTE: Noncombustible material such as refractory brick
maybeusedtolinetheoorofthereplaceinorderto
raise the height of the gas log set in relation to a restrictive
barrier. If the unit is raised, the minimum height dimension
listedinthehomeowner’smanualmustnotbeexceeded.
NOTE: If the log set is equipped with a remote receiver, a
restrictive barrier may reduce the battery life by increasing
theambienttemperatureinsidethereplace.Placement
of the receiver outside of the replace will extend the
battery life.
X
FP1995
logset in enclosure
Glass door frames
with adjustable
louvers should
have the louvers
fully open while
the unit is in
operation.
Height of restrictive
barrier caused by glass
door frames, recessed
replaces,etc.fromthe
base or bottom surface
of the unit. (Refer to
Table).
The log set
should be placed
against or as
near as possible
to the rear wall
of the replace/
rebox.
Depthofreplace/
rebox.
(Refer to Table).
Figure 2 -
Reference Drawing of the MJ27 Log Set in an Enclosure
86D0024 7
"MOJO" Series Unvented Gas Log Sets
Sidewall and ceiling clearances: The sides ofthere-
place opening must be at least 16" from any combustible
wall. The ceiling must be at least 42" from the top of the
replaceopening.
WARNING
The dimensions shown in Figures 3 through
11 and dened in the replace manufacturer's
instructions are minimum clearances to
maintain when installing this heater. Left
and right clearances are determined when
facing the front of the heater.
When heater is installed into a ventless
rebox, minimum clearances, as specied
by the ventless rebox manufacturer, must
be met.
Follow these instructions carefully to
ensure safe installation. Failure to follow
instructions exactly can create a re hazard.
16"
42"
FP1996
wall ceiling clearances
FP1996
Figure 3 -
Sidewall and Ceiling Clearances
CLEARANCE and HEIGHT REQUIREMENTS
Heat resistant material (minimum requirements) with
no wooden mantel or other combustible projection:
To install the gas logs into a replace with no wooden
mantel, shelf or other combustible projection above the
replace opening, measure the heat resistant material
height according to Figure 4, then see TABLE A.
Heat resistant materials such as slate and marble must be
at least 1/2” thick. Sheet metal should not be installed
onto combustible material.
TABLE A -
Heat Resistant Material Requirements with no Mantel
or Combustible Projection
FP1997
heat resistant material
Heat Resistant
Material
Heater in Fireplace or
Firebox
FP1997
Measure
This
Distance
Figure 4 -
Measuring Heat Resistant Material
Heat Resistant
Material Requirements for Safe Installation
Measurement MJ27
12” or more Hood not required
 8”orlessthan12” Extendheatresistantmaterialto12”
OR install hood. Figure 5
 Lessthan8” Extendheatresistantmaterialtoat
least 8” AND install hood. Figure 5. OR,
extendheatresistantmaterialtoa
height of at least 12".
86D0024
8
"MOJO" Series Unvented Gas Log Sets
CLEARANCE and HEIGHT REQUIREMENTS
Heat resistant material (minimum requirements) with
wooden mantel or other combustible projection:
To install the heater with a wooden mantel, shelf or other
combustible projection above, first measure the heat
resistant material shown in Figure 5, then refer to Table B.
Heat Resistant Requirements for Safe Installation
Material w/Wood Mantel Shelf or other
Measurement Combustible Projection
MJ27
 12”ormore Hoodnotrequired.Observeprole
(side elevations) shown in Figure 7.
 8”orlessthan12” Installhoodandobserveprolesin
Figure 6; ORextendheatresistantmate-
  rialtoatleast12"andobserveprolesin
Figure 8.
 Lessthan8" Extendheatresistantmaterialtoat
least 8", install hood and observe pro-
  lesinFigure 6; ORextendheatresis-
tant material to at least 12" and observe
  prolesin Figure 7.
FP1998
heat resist mantel
Hood
Heater in
Fireplace or
Firebox
8" or More of
Heat Resistant
Materials
FP1998
Figure 5 -
Measuring Heat Resistant Material for Mantel
TABLE B -
Heat Resistant Material Heights and Mantel Location
Figure 6 -
Minimum Mantel Clearance with Hood - All Models
10"
12"
8"
6"
2
1/2
"
8" 14
1/2
"18
5/8
"
22
1/2
" 26"
FP1999
min. mantel clearance
Heat
Resistant
Material
Hood
Heater in
Fireplace or
Firebox
FP1999
Example: A mantel may
project from the wall a max-
imum of 21⁄2" at a minimum
of 8" above the opening,
and a maximum of 6" at a
minimum of 141⁄2" above
the opening.
Figure 7 -
Minimum Mantel Clearance with No Hood — MJ27
Example: The bottom of
the mantel may project
fromthewallamaximum
of 10" at a minimum of 28"
above the opening.
12" min. 28"
FP2001
minimum mantel clearance no hood
Heat Resistant
Material
Heater in Fireplace
orFirebox
FP2001
10" or Less
86D0024 9
"MOJO" Series Unvented Gas Log Sets
Figure 8 is an example of an unsafe mantel installation.
Thismantelprojects4"at8"abovetheopening,exceeding
themaximumacceptabledistanceof21/2" The mantel also
projects 7" at 141/2" above the opening, exceeding the
maximumacceptabledistanceof6".
Ifyourmantelproleisunsafe,youmayeither:
• Raise the mantel to an acceptable height
OR
• Remove the mantel
INSTALLATION REQUIREMENTS
FP2002
mantel clearances unsafe
14¹⁄₂”
2¹⁄₂"
8"
6"
7"
4"
Mantel
Minimum of 8"
Heat Resistant
Material
Hood
FP2002 Figure 8 -
Minimum Mantel Clearance with Hood - MJ27
(Example of Unsafe Installation)
FLOOR CLEARANCES
The gas log heater must be installed at least 13/8" above
any combustible ooring material, such as carpeting or
tile,whichiscloserthan14"tothebaseofthereplace.
The minimum distance must be maintained from the top
surface of carpeting, tile, etc. Figure 9
OR
Thegaslogheatermaybeinstallednearertotheoorifa
minimum of 14" of noncombustible material such as slate
ormarbleisinstalledbetweenthebaseofthereplaceand
thecombustibleooring.Figure 10
Heater in
Fireplace or
Firebox
Combustible
Material
FP2003
Figure 9 -
Minimum Clearance above Combustible Flooring
14" Minimum
FP2004
min clear nocomb floor
Heater in
Fireplace or
Firebox
Combustible
Material
This Distance May Now be Less
Than 13⁄8"
FP2004
Figure 10 -
Minimum Clearance above Combustible Flooring with
Noncombustible Material Installed at Base of Fireplace
86D0024
10
"MOJO" Series Unvented Gas Log Sets
BEFORE FULLY INSTALLING THE UNIT:
• Turn OFF thegassupplytothereplaceorrebox.
• Seal any fresh air vents and/or ash clean-out doors
locatedontheoororwallofthereplace.Ifleftun-
sealed, drafting may cause pilot outage or sooting. Use
a heat resistant sealant. Do not seal the chimney ue
damper.
INSTALLATION
WARNING
Before installing in a solid fuel burning
fireplace, The chimney flue and firebox
must be cleaned of soot, creosote, ashes
and loose paint by a qualified chimney
cleaner.
PLACE AND SECURE APPLIANCE
WARNING
You must secure the gas log heater to
the replace oor. If not, the entire unit
may move when you adjust the controls.
Movement of unit may cause shifting of
the gas logs which leads to sooting and
improper burning. Grate movement could
cause a gas leak.
Special care is required if you are installing
the unit into a sunken replace. You must
raise the replace oor to allow access to
gas log controls. This will insure adequate
air ow and guard against sooting. Raise
the replace oor using noncombustible
materials, as described in Placement in a
Fireplace with Restrictive Barrier on Page 6.
ASSEMBLY PROCEDURE:
1. Centerthegaslogunitonthereplaceorrebox.Make
certain the front of the burner sits inside the front edge
ofthereplaceorrebox.
2. Anchor holes are located on the right and left sides of
the unit. After centering the burner correctly, mark the
holepositionsonthereplace/reboxoor.Drilltwo(2)
5/32"diameterholesapproximately11/2" deep.
3. Anchortheburnertothereplace/reboxoorusing
the screws provided. Figure 12
Proper installation of the heater is essential to prevent
any movement of the gas logs and controls during
operation.
FP2006
secure to floor
Figure 12 -
Secure Heater to Floor of Fireplace/Firebox
Screw
Anchor Hole
Screw
FP2006
86D0024 11
"MOJO" Series Unvented Gas Log Sets GAS LINE INSTALLATION
IMPORTANT: Hold heater valve rmly with a wrench to
prevent movement when connecting to inlet pipe.
CONNECT THE GAS
NOTICE: Aqualiedgasapplianceinstallermustconnect
the heater to the gas supply. Consult all local codes.
CAUTION
Use new black iron or steel pipe. Internally
tinned copper or copper tubing can be
used per National Fuel Code, section 2.6.3,
providing gas meets hydrogen sulde limits,
and where permitted by local codes. Gas
piping system must be sized to provide
minimum inlet pressure (Listed on Data
Plate) at the maximum ow rate (BTU/Hr).
Undue pressure loss will occur if the pipe
is too small.
A manual shutoff valve must be installed
upstream of the appliance. Union tee
and plugged 1/8" NPT pressure tapping
point should be installed upstream of the
appliance. Figure 13
FP2007
gas connection
FP2007
Pipe Coupling
To Heater
Valve
Gas Supply Inlet
Manual Shutoff
Valve
Pipe
Stainless
FlexibleTube
Figure 13 -
Gas Connection
Locations that the Pressure Tapping Point
May Be Installed
Connecting directly to an unregulated pro-
pane/LPG tank can cause an explosion.
WARNING
CHECK GAS TYPE: The gas supply must
be the same as stated on the heater’s rat-
ing plate. If the gas supply is different, DO
NOT INSTALL THE HEATER. Contact your
dealer for the correct model.
WARNING
Always use an external regulator for all propane/LPG
heaters and high pressure one to two-pound systems
only,toreducethesupplytankpressuretoamaximumof
13" w.c. This is in addition to the internal regulator in the
heater valve.
86D0024
12
"MOJO" Series Unvented Gas Log Sets
CHECK GAS PRESSURE
The heater gas inlet connection is a 3/8" NPT at the valve.
On all control type units, the inlet connection is on the right
side of unit. To connect from the opposite side, route the
pipe around the back portion of the unit.
When tightening up the joint to the valve, hold the valve
securely to prevent movement.
Test all gas joints from the gas meter to the heater valve for
leaks using a gas analyzer or soap and water solution after
completing connection. DO NOT USE AN OPEN FLAME.
Check the gas pressure with the appliance burning and
the control set to HIGH.
Millivolt Valve Control
Figure 14
The valve regulator controls the burner pressure which
should be checked at the pressure test point.
Turn captured screw counter clockwise two or three turns
and then place tubing to pressure gauge over test point
(Use test point “OUT” closest to control knob). After taking
pressure reading, be sure and turn captured screw clock-
wisermlytore-seal.Donotovertorque.Checkforgas
leaks.
FP2008
gas valve
FP2008
Figure 14 - Pressure Test Point Location
Millivolt Control
Test Port “OUT”
86D0024 13
"MOJO" Series Unvented Gas Log Sets ELECTRICAL WIRING - MILLIVOLT
The Millivolt valve is a self-powered combination gas con-
trol THAT DOES NOT REQUIRE 110V AC TO OPERATE.
CAUTION
Label all wires prior to disconnection when
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing.
FP2009
MJ wiring diagram
FP2009
Motor
Figure 15 -
Wiring Diagram
ODS Pilot
Millivolt
Valve
TH = 3
TP = 1
TP/TH = 2
86D0024
14
"MOJO" Series Unvented Gas Log Sets
ELECTRICAL WIRING - MILLIVOLT
CONNECT REMOTE RECEIVER
1. Set remote receiver. Refer to instructions included in
receiver kit.
2. Connect the two (2) 1/4" female connec-
tors to the TP/TH and TH terminals on the
control valve.
3. Connect the four-pin connector from the
valve motor to the four-pin connector on
the receiver.
4. For further instruction refer to instruction
sheet included with RCSIT Remote.
FP2010
remote receiver
Figure 16 -
Installing Remote Receiver
Remote Receiver
Remote Wire
Connectors
Valve FP2010
Motor
Wires
NOTICE
Do not allow wires to touch grate or
burner.
NOTE: Heat reduces battery life. You can
protectthereceiverandextendbatterylife
by mounting receiver in wall or other location
outsidethereplace.
A. Complete Millivolt System Check
(“A” Reading - Thermostat contacts CLOSED - Con-
trol Knob “ON” - Main burner should turn ON)
1. If the reading is more than 175 Millivolts and the
automatic valve still does not come on, replace the
control.
2. If the closed circuit reading (“A” reading) is less than
175 Millivolts, determine cause for low reading, pro-
ceed to Section B below.
CHECK SYSTEM OPERATION
The Millivolt system and individual components may be
checked with a Millivolt meter having a 0-1000 mV range.
Conduct each check shown in chart below by connection
meter test leads to terminals as indicated.
Connect Switch or Meter
Check Meter Leads Thermostat Reading
Test To Test To Terminals Contacts Should Be
A Complete 2 & 3 Closed Minimum 175
System
B Thermopile 1 & 2 Open Minimum 500
Output
B. Thermopile Output Reading Check
(“B” Reading - Thermostat contacts OPEN - Main
burner OFF)
1. Check gas pressure to the unit. If gas pressure is
withinminimumandmaximumondataplate,then
check pilot voltage, 500 Millivolts minimum. If the
minimum Millivolt reading is not obtainable, replace
pilot.
86D0024 15
"MOJO" Series Unvented Gas Log Sets
PLACE ROCK WOOL
Before installing logs, place rockwool in dime size
pieces evenly over small burner ports starting in
front of the rear deector shield towards the front.
Avoid placing rock wool over the slots on rear and
rightsideofburnerandonlargeyellowameports
on front of burner.
Wash hands after placing rock wool. Itching
may occur.
LOG PLACEMENT
Before you begin — This unit is supplied with seven (7)
ceramicberlogs.Donothandletheselogswithyourbare
hands. Always wear gloves to prevent skin irritation
from ceramic bers. After handling the logs, wash your
hands gently with soap and water to remove any traces
ofbers.
Dime-Sized
Pieces of Rock
Wool
FP2011
place rock wool
FP2011
Figure 17 -
Place Rock Wool
WARNING
The positioning of the logs is critical to
the safe and clean operation of this heater.
Sooting and other problems may result if the
logs are not properly and rmly positioned
in the appliance. Never add additional logs
or embellishments such as pine cones,
vermiculite or rock wool to the heater. Only
use the logs and 2G-RW rock wool.
Failure to position the parts in accordance
with diagrams below or to use only parts
specically approved for this heater may
result in property damage or personal injury.
LG552
ember placement
10/08
Figure 18 -
Correct Rock Wool Placement
LG552
WARNING
• Use only rock wool provided with
log set.
• Do not add additional rock wool.
86D0024
16
"MOJO" Series Unvented Gas Log Sets
LG553
MJ127 log 8
10/08
Log #8
LG553
Figure 19
1. Placelog#8onrightbracketnextto
valve by sliding grooves on sides of
log into cutout on brackets. Figure 19
LG554
MJ127 log 1
10/08
Log #1
LG554
Figure 20
2. Place log #1 by setting the log over
the rear bracket over the two pins.
Figure 20
LG555
MJ127 Log #2
10/08
Log #2
LG555
Figure 21
3. Place log #2 at an angle across the
burner by setting the log over the
two pins located on top of the burner.
Figure 21
4. Place log #3 at an angle over log #2 toward
the back by matching the rectangular notch
on the bottom of this log with the rectangular
protrusion on log #2. Set the notch located on
the bottom of this log toward the back over the
metal bracket located to the right side of the
burner. Figure 22
LG545
MLDV log 3
Figure 22
Log #3
LG545
LOG PLACEMENT
86D0024 17
"MOJO" Series Unvented Gas Log Sets
LG546
MLDV log #4
Log #4
LG546
Figure 23
5. Place Log #4 by matching the rectangu-
lar protrusion on the bottom of this log
over the rectangular notch on log #3.
Swing the log slightly to the front and
set the log over the notch located on the
upper surface of log #3. Figure 23
LG547
MLDV log #5
Log #5
LG547
Figure 24
6. Place log #5 by matching the rectangular notch
on the bottom of the log with the rectangular
protrusion on log #2. Set the notch on the bottom
of this log over the very far left tong on the grate.
Figure 24
LG548
MLDV log 6
Log #6
Figure 25
LG548
7. Place log #6 at an angle over log
#5 toward the back by matching the
rectangular notch on the bottom of this
log with the rectangular protrusion on
log #5. Set the notch located on the
bottom of this log toward the back over
the metal bracket located to the left
side of the burner. Figure 25
LOG PLACEMENT
86D0024
18
"MOJO" Series Unvented Gas Log Sets
8. Place log #7 between the second and
third right tong on the grate as shown in
Figure 26.
LG549
MLDV log #7
Log #7
Figure 26
LG549
LOG PLACEMENT
PLACE FLICKERING EMBERS
Placeickeringbrightembers(FBE-1G)afterplacinglogs
on burner. Pull apart into small strands and place on top of
existingrockwoolinfrontofandbetweenfrontlogswhere
they can be seen. Try to avoid stacking these embers on
topofeachother.Usesmaller,stringierstrandsformax-
imum effect. Use as much as needed until desired effect
is achieved.
LG557
MJ27 flickering embers
10/08
Flickering Ember
Area
Figure 27 -
Place Flickering Bright Embers LG556
PLACE THE DECORATIVE ROCK
CAUTION
DO NOT sprinkle volcanic rock on the logs,
around the pilot, or on or near burners. This
may cause sooting. Place volcanic rock only
on the oor of the replace.
During initial operation of the new heater,
new burning logs and/or rock wool will give
off a paper burning smell and orange ames
will be present. Simply open the windows
for a few hours to vent the odor.
86D0024 19
"MOJO" Series Unvented Gas Log Sets FLAME APPEARANCE
Flames from the pilot and burner should be visually
checked as soon as the heater is installed. In addition,
periodically check the ames visually during operation.
CHECK PILOT FLAME
The pilot ame must always be present when the heater
is in operation. It should just touch the top of the ther-
mocouple tip for natural. Figure 28 forcorrectpilotame.
Ifthepilotamedoesnottouchthethermocouple,then
the main burner cannot function reliably. Refer to Figure
29 forincorrectshapeofpilotame.
FP2015
pilot flame wrong
FP2015
Figure 29 -
Incorrect Appearance of Pilot Flame
Thermocouple
for LP
Thermocouple
for Natural
Figure 28 -
Correct Appearance of Pilot Flame
FP2014
pilot flame correct
Thermocouple
for Natural
Thermocouple
for LP
FP2014
LG551a
Figure 30 -
Correct Burner Flame Appearance
In normal operation at full rate after 15 minutes, the
following ame appearances should be observed:
Burner will have a random pattern of yellow ames as
shown in Figure 30. There should be glowing embers on
the front burner. Note: The front ames and embers
will be an opaque orange color during the burn off time.
86D0024
20
"MOJO" Series Unvented Gas Log Sets
OPERATING INSTRUCTIONS
Avoid any drafts that alter burner ame patterns. Do
notallowfanstoblowdirectlyintothereplace.Donot
placeablowerinsidetheburnareaoftherebox.Ceiling
fansmaycreatedraftsthatalteramepatterns.Sooting
and improper burning will result.
During manufacturing, fabricating and shipping, various
components of this appliance are treated with certain oils,
lmsorbondingagents.Thesechemicalsarenotharmful,
but may produce annoying smoke and smells as they are
burned off during the initial operation of the appliance,
possibly causing headaches or eye or lung irritation. This
is a normal and temporary occurrence.
OPERATION
The initial break-in operation should last four hours with the
burneratthehighestsetting.Providemaximumventilation
by opening windows or doors to allow odors to dissipate.
Any odors remaining after this initial break-in will be slight
and will disappear with continued use.
This appliance must not be used with glass doors in the
closed position. This can lead to pilot outages and severe
sootingoutsidethereplace.Refer to Page 6, Figure 2.
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
Page is loading ...
  • Page 1 1
  • Page 2 2
  • Page 3 3
  • Page 4 4
  • Page 5 5
  • Page 6 6
  • Page 7 7
  • Page 8 8
  • Page 9 9
  • Page 10 10
  • Page 11 11
  • Page 12 12
  • Page 13 13
  • Page 14 14
  • Page 15 15
  • Page 16 16
  • Page 17 17
  • Page 18 18
  • Page 19 19
  • Page 20 20
  • Page 21 21
  • Page 22 22
  • Page 23 23
  • Page 24 24
  • Page 25 25
  • Page 26 26
  • Page 27 27
  • Page 28 28
  • Page 29 29
  • Page 30 30

MHSC MJ27NR Install Manual

MHSC
Brand
MHSC
Model
MJ27NR
Category
Fireplaces
Type
Install Manual
This manual is also suitable for
Download PDF
report

Ask a question and I''ll find the answer in the document

Finding information in a document is now easier with AI

Related papers

Other documents